Vftek



Aug, 28, 1951 H WTEK 2,566,100

.SAWDUST BURNING STOVE Filed July 50, 1947 Patented Aug. 28, 1951 UNITED STATES PATENT OFFICE Application July 30, 1947, Serial No. 7 64,807 In Czechoslovakia September 6,1939

Section 1, Public Law 690, August 8, 1946 Patent expires September 6, 195 9 3 Claims. (01.1104) The present invention relates to slow combustion stoves for burning saw-dust and similar waste material. The chief object of the invention is to provide an easy and clean handling of the container, into which the combustible has to be filled, and furthermore to prevent the possibility of the horizontal air duct formed in the layers of the combustible being obstructed and thus leading to a danger of explosion.

According to the present invention the first object is achieved by forming a stove in which the container can be inserted from the side into the space between a stable top portion of the stove casing and the base with which the beforenamed portion is firmly connected, whereby the wall of the container forms the outer surface of the stove. Thus the difiicult lifting of the full or empty container during refilling falls off. The outer surface of the container is maintained clean and does not cause soiling of the person handling the container, as it is the case with stoves, in which the container is wholly in serted into an outer casing and the smoke has access to its outer surface.

The other object is achieved by formin a special chamber inside of the container adjacent to the air inlet opening and communicating into the vertical air duct the walls of which are formed by the combustible and which is produced e. g. by removing a mandrel around which the combustible being filled in is evenly distributed or stamped.

In order that the present invention may be clearly understood and readily carried into effeet, the same will now be described more fully, by way of example, with reference to the accompanying drawing, in which:

Figure 1 represents the stove in longitudinal section,

Figure 2 is a diagrammatic section along the line IIII of Fig. 1 of the connecting device between the container and the stable stove casing,

Figure 3 is a section along I-I of Fig. 1.

In the drawing, I denotes the cylindrical container made of thick iron sheet and seated on the base 10. The container is provided with a hole 2 serving as air inlet and its flow area is adjustable by means of a flap-valve 3. At the air inlet a chamber 4 with rigid walls is formed inside of the container, its inner end communicating into the vertical air duct 24 of the combustible filling 25. The container may be inserted from the side on to the base and at its upper end is connected to a cylindrical casing ll, closed by a cover. A mouthpiece 13 to re- Fig. 1 are represented in a position angularly displaced by 90.

The tight connection of the container Ill with the casing II is obtained by segment-shaped bands l5, l5 rotatably mounted on the casing by means of hinge M. The free end of the segment 15 is provided with a buckle 18, the bent end of which engages with a counternose [6 of the segment [5 whereby connection of both segments l5, l5 and fastening of the bands to the cylindrical surface of the container is obtained.

When the container I has to be filled with combustible e. g. with saw-dust, the buckle I8 is opened, the container removed from the base I0 using the handle 5 and a mandrel inserted into the same adjacent to the open wall of the chamber 4. After filling with saw-dust 25 the mandrel is removed leaving an air duct the walls of which are formed by the combustible itself. The duct communicates both with the chamber 4, into which air is brought in through the hole 2, and with the space of the stable casing l I, when the container has been placed on the base. The segments l5, I5 are fastened together by the buckle l8 whereby a tight connection of the container with the stable casing H is obtained.

The saw-dust charge it lit through the hole 2 and the gases, produced by the combustion of combustible in the container l which thus forms the charging space and fire-room, escape through the duct 24 and mouthpiece I3 into the chimney. The combustion is regulated by suit able adiustment of the flap-valve 3 regulating the air intake. The warmth, produced by burning is transmitted through radiation to the air of the room.

It will be understood that the embodiment described is given by way of example and that the invention may be carried out in various other way.

What I claim is: l. A stove for sawdust or similar fuel material, including the combination, with a base forming a support, of a top portion having an outlet opening adapted for connection to a flue; external means for rigidly supporting the top portion permanently in an elevated position spaced a predetermined fixed distance above the base; an intermediate casing removably supported on said base intermediate th same and the top portion for containing the fuel and hav- 3 ing' an air inlet port; a depending wall section upon said top portion partly surrounding a portion of the upper edge of said intermediate casing and terminating in a pair of opposite ends presenting a gap therebetween opposite to said depending wall section; a pair of segment shaped bands hinged to the opposit ends of said depending wall section for opening and closing movement in a substantially horizontal plane, the segment shaped bands in closed position closing the gap between said opposite ends of said depending wall section and surrounding the re maining portion of the upper ed e of said intermediate casing in such manner as to interconnect said top portion with the upper end of said intermediate casing when the latter stands on said base; and cooperating lock means disposed on the outer ends of said segment shaped bands for locking the latter together in closed position to firmly enclose said remaining portion of said intermediate casing and the corresponding part of said top portion, said gap between the opposite ends of said depending wall section allowing the removal of said intermediate casing in a horizontal direction when said segment shaped bands are open.

2. A stove for sawdust or similar fuel material, including the combination, with a base forming a support, of a top portion having an outlet opening adapted for connection to a fiue; external means for rigidly supporting the top portion permanently in an elevated position spaced a predetermined fixed distance above the base; an intermediate casing removably supported on said base intermediate the same and the top portion for containing the fuel and having an air inlet port; a depending wall section upon said top portion partly surrounding a portion of the upper edge of said intermediate casing and terminating in a pair of opposite ends presenting a gap therebetween opposit to said depending wall section; a pair of segment shaped bands hinged to the opposite ends of said depending wall section for opening and closing movement in a substantially horizontal plane, the segment shaped bands in closed position closing the gap between said opposite ends of said depending wall section and surrounding the remainin portion of the upper edge of said intermediate casing in such manner as to interconnect said top portion with the upper end of said intermediate casing when the latter stands on said base; and cooperating buckle portions disposed on the outer ends of said segment shaped bands for locking the latter together in closed position to firmly enclose said remaining portion of said intermediate casing and the corresponding part of said top portion, said gap be tween the opposite ends of said depending wall section allowing the removal of said intermediate 4 casing in a horizontal direction when said segment shaped bands are open. I

3. A stove for sawdust or similar fuel material, including the combination, with a base forming a support, of a top portion having an outlet opening adaptedfor connectionto a flue; external means for rigidly supporting the top portion permanently in an elevated position spaced a predetermined fixed distance above the e outlet opening.

base; an intermediate casing removably supported on said base intermediate the same and the top portion for containing the fuel and having an air inlet port; a depending wall section upon said top portion partly surrounding a portion of the upper edge of said intermediate casing and terminatingin a pair of opposite ends presenting a gap therebetween opposit to said depending wall section; a pair of segment shaped bands hinged to the opposite ends of said depending wall section for opening and closing movement in a substantially horizontal plane, the segment shaped bands in closed position closing the gap between said opposite ends of said depending wall section and surrounding the remaining portion of the upper edge of said intermediate casin in such manner as to interconnect said top portion with the upper end of said intermediate casing when the latter stands on said base; cooperating lock means disposed on the outer ends of said segment shaped bands for locking the latter together in closed position to firmly enclose said remaining portion of said intermediate casing and the corresponding part of said top portion, said gap between the opposite ends of said depending wall section allow ing th removal of said intermediate casing in a horizontal direction when said segment shaped bands are open; and wall means forming an errclosed chamber in said intermediate casin adjacent to; and in communication with,'said air inlet port, said chamber being adapted to connect with a vertical duct to be formed in a charge of said fuel'material' order to provide a communication between said air intake port and said HUBERT VI'TEK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 430,912 AshWOIilh, June 24, 1890 1,419,600 Anderson Jun 13, 1922 FOREIGN PATENTS Number Country Date 91,287 Switzerland Oct. 17, 1921 152,134 Great Britain Oct. 14, 1920 543,149. Great Britain Feb. 20, 1936 

